I highly recommend Big Water Storage. I have stored with them for years. Indoors and plugged in to keep the batteries charged - Big Water Boat Storage
You call and let them know you are coming and they pull the boat out. 8 Miles to the Stateline Ramp and there is a gas station halfway for gas and ice etc... Works out great for us.
Downside to Antelope is you have to deal with the maytag straights (rough water) on busy weekends (not as bad in the winter). I'd prefer Wahweap as long as the cut is open.
Your boat is perfect for the lake. Big enough to be comfortable but also small enough to access some of the deeper canyons..